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Quantitative magnetization transfer MRI of desmoplasia in pancreatic ductal adenocarcinoma xenografts
Author(s) -
Li Weiguo,
Zhang Zhuoli,
Nicolai Jodi,
Yang GuangYu,
Omary Reed A.,
Larson Andrew C.
Publication year - 2013
Publication title -
nmr in biomedicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.278
H-Index - 114
eISSN - 1099-1492
pISSN - 0952-3480
DOI - 10.1002/nbm.3004
Subject(s) - desmoplasia , in vivo , pancreatic ductal adenocarcinoma , adenocarcinoma , pathology , biomarker , fibrosis , magnetization transfer , medicine , chemistry , cancer research , pancreatic cancer , magnetic resonance imaging , biology , cancer , radiology , biochemistry , microbiology and biotechnology
Quantitative assessment of desmoplasia in pancreatic ductal adenocarcinoma (PDAC) may be critical for staging or prediction of response to therapy. We performed quantitative magnetization transfer (qMT) MRI measurements in 18 mouse xenograft tumors generated from three PDAC cell lines. The qMT parameter bound proton fraction (BPF) was found to be significantly higher in tumors grown using the BxPC‐3 cell line (5.31 ± 0.87, mean ± standard deviation) compared with the BPF measured for tumors grown from Panc‐1 (3.65 ± 0.60) and Capan‐1 (1.50 ± 0.58) cell lines ( P < 0.05 for each comparison). Histologic measurements demonstrated a similar trend; BxPC‐3 tumors had significantly higher fibrosis levels (percentage of fibrotic tissue area, 6.21 ± 2.10) compared with Panc‐1 (2.88 ± 1.13) and Capan‐1 (1.69 ± 1.01) tumors. BPF was well correlated with quantitative fibrosis levels ( r = 0.77, P < 0.01). Our results indicate that qMT measurements offer the potential to noninvasively quantify fibrosis levels in PDAC mouse xenograft models and thus serve as a valuable in vivo biomarker of desmoplasia in PDAC. Copyright © 2013 John Wiley & Sons, Ltd.